/Engine/Source/Runtime/Core/Public/Serialization/PackageWriter.h
struct FCapabilities
bool
bDeclareRegionForEachAdditionalFile
Whether an entry should be created for each BulkData stored in the BulkData section This is necessary for some Writers that need to be able to load the BulkDatas individually.
bool
bIgnoreHeaderDiffs
Applicable only to -diffonly saves; suppresses output and breakpoints for diffs in the header.